blockbaseopr

{
  "name": "histvalidate",
  "base": "",
  "fields": [
    {
      "name": "owner",
      "type": "name"
    },
    {
      "name": "producer",
      "type": "name"
    },
    {
      "name": "blockHash",
      "type": "string"
    }
  ]
}